WO2016182531A1 - Répartition de charge entre une pluralité de couches de fréquence d'une pluralité de cellules - Google Patents

Répartition de charge entre une pluralité de couches de fréquence d'une pluralité de cellules Download PDF

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Publication number
WO2016182531A1
WO2016182531A1 PCT/US2015/000423 US2015000423W WO2016182531A1 WO 2016182531 A1 WO2016182531 A1 WO 2016182531A1 US 2015000423 W US2015000423 W US 2015000423W WO 2016182531 A1 WO2016182531 A1 WO 2016182531A1
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WIPO (PCT)
Prior art keywords
cell
reselection
processors
value
base station
Prior art date
Application number
PCT/US2015/000423
Other languages
English (en)
Inventor
Nithin SRINIVASAN
Candy YIU
Original Assignee
Intel IP Corporation
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Intel IP Corporation filed Critical Intel IP Corporation
Publication of WO2016182531A1 publication Critical patent/WO2016182531A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/20—Selecting an access point
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
    • H04W36/00835—Determination of neighbour cell lists

Definitions

  • Wireless mobile communication technology uses various standards and protocols to transmit data between a node (e.g., a transmission station) and a wireless device (e.g., a mobile device).
  • Some wireless devices communicate using orthogonal frequency-division multiple access (OFDMA) in a downlink (DL) transmission and single carrier frequency division multiple access (SC-FDMA) in an uplink (UL) transmission.
  • OFDMA orthogonal frequency-division multiple access
  • SC-FDMA single carrier frequency division multiple access
  • OFDM orthogonal frequency-division multiplexing
  • 3GPP third generation partnership project
  • LTE long term evolution
  • IEEE Institute of Electrical and Electronics Engineers
  • 802.16 standard e.g., 802.16e, 802.16m
  • WiMAX Worldwide Interoperability for Microwave Access
  • IEEE 802.1 1 which is commonly known to industry groups as WiFi.
  • Evolved Universal Terrestrial Radio Access Network (E-UTRAN) system is referred to as an eNode B (also commonly denoted as evolved Node Bs, enhanced Node Bs, eNodeBs, or eNBs), which communicates with the wireless device, known as a user equipment (UE).
  • the downlink (DL) transmission can be a communication from the node (e.g., eNodeB) to the wireless device (e.g., UE), and the uplink (UL) transmission can be a communication from the wireless device to the node.
  • data can be transmitted from the eNodeB to the UE via a physical downlink shared channel (PDSCH).
  • PDSCH physical downlink shared channel
  • a physical uplink control channel (PUCCH) can be used to acknowledge that data sent on the PDSCH was received at the UE.
  • Data can be transmitted from the UE to the eNodeB via a physical uplink shared channel (PUSCH).
  • PUSCH physical uplink shared channel
  • a physical downlink control channel (PDCCH) can be used to acknowledge that data sent on the PUSCH was received at the eNodeB.
  • Downlink and uplink channels or transmissions can use time-division duplexing (TDD) or frequency-division duplexing (FDD).
  • TDD time-division duplexing
  • FDD frequency-division duplexing
  • FIG. 1 illustrates a multiple-frequency deployment of a cellular network in accordance with an example
  • FIG. 2 illustrates another multiple-frequency deployment of a cellular network in accordance with an example
  • FIG. 3 illustrates another multiple-frequency deployment of a cellular network in accordance with an example
  • FIG. 4 illustrates functionality of a UE in accordance with an example
  • FIG. 5 illustrates functionality of a cellular base station in accordance with an example
  • FIG. 6 provides an example illustration of a wireless device in accordance with an example
  • FIG. 7 provides an example illustration of a user equipment (UE) device, such as a wireless device, a mobile station (MS), a mobile wireless device, a mobile communication device, a tablet, a handset, or other type of wireless device; and
  • UE user equipment
  • FIG. 8 illustrates a diagram of a node (e.g., eNB and/or a Serving GPRS
  • a wireless device e.g., UE
  • Some examples relate to systems, methods, and computer readable media to enable user equipments (UEs) in radio resource control (RRC) idle mode to perform cell reselection in a multiple- frequency deployment of wireless cells in a manner that avoids limitations of existing approaches that are used for cell reselection.
  • RRC radio resource control
  • a first option (current load-balancing option 1 ) the network broadcasts a cellReselectionPriority parameter in a system information (SI) broadcast.
  • SI system information
  • the cellReselectionPriority parameter specifies an absolute priority for each respective frequency of the multi-carrier deployment.
  • Some UEs that read the SI can then reselect to a cell with a higher frequency priority than the UE's current serving frequency if there is no dedicated priority configured or the dedicated priority has been expired.
  • Current load-balancing option 1 can be used by UEs that are in Radio-Resource-Control (RRC) idle mode.
  • RRC Radio-Resource-Control
  • a dedicated priority can be applied for a specific frequency.
  • the dedicated priority can only be configured when a UE is in RRC connected mode.
  • the network may have to force (or wait for) the UE to enter connected mode and use handover for load-balancing purposes.
  • a cell-specific offset can be configured by the network to prioritize some cells over other cells.
  • Current load-balancing option 3 can pose a problem, though, in that UEs at a cell edge may experience poor channel quality.
  • the network can simply perform load balancing while UEs are in RRC connected mode. This approach, however, introduces delay and can lead to handover failure.
  • FIG. 1 illustrates an example of a multiple-frequency deployment of a cellular network with macro cells 102 and 104 and small cells 106, 108, and 1 10.
  • Macro cell 102 may be served by the evolved node B (eNB) 1 12, while macro cell 104 may be served by the eNB 1 14.
  • Small cells 106, 108, and 1 10 may be served by small eNBs 1 16, 1 18, and 120, respectively.
  • the UEs 122 and 124 can be camped onto, or otherwise connected to, the macro cell 102.
  • FIG. 1 is organized vertically into three cell groups lOla-c.
  • Cell group lOla-c Cell group
  • cell group 101 a includes cells that operate at a first frequency layer (i.e., the macro cell 102), cell group 101 b includes cells that operate at a second frequency layer (i.e., the macro cell 104 and the small cell 106), and cell group 101c includes cells that operate at a third frequency layer (i.e., small cells 108 and 1 10).
  • the cell groups lOla-c are vertically separated in FIG. 1 for clarity, the cell groups 101 a-c correspond to a single geographical region wherein cells operating at different frequency layers overlap with each other.
  • the term "frequency layer" can refer to a carrier frequency.
  • FIG. 1 provides an example of how limitations of the current load-balancing approach (e.g., current load-balancing option 1 ) used in 3GPP LTE networks can result in a suboptimal distribution of idle-mode user equipments (UEs) across cells that use different frequency layers.
  • UEs idle-mode user equipments
  • the cellular network has two configuration options.
  • the first configuration option the cellular network can set the priority of the second frequency layer to be higher than the priority of the first frequency layer. If this first configuration option is applied, the UE 122 will reselect to the small cell 106 and the UE 124 will reselect to the macro cell 104.
  • the cellular network can set the priority of the third frequency layer to be higher than the priority of the first frequency layer. If this second configuration option is applied, the UE 122 will reselect to the small cell 108 and the UE 124 will reselect to the macro cell 1 10.
  • the first configuration option causes the UE 124 to move to the macro cell 104
  • the second configuration option 2 causes the UE 122 to move to the small cell 108.
  • Neither outcomes optimally utilizes both of the under-loaded small cells 106 and 1 10.
  • FIG. 2 illustrates another example of a multiple-frequency deployment of a cellular network with macro cells 202 and 204 and small cells 206, 208, and 210.
  • Macro cell 122 may be served by the evolved node B (eNB) 212, while macro cell 204 may be served by the eNB 214.
  • Small cells 206, 208, and 210 may be served by small eNBs 216, 218, and 220, respectively.
  • the UEs 222a-n can be camped onto, or otherwise connected to, the macro cell 202.
  • FIG. 2 is organized vertically into three cell groups 201 a-c.
  • Cell group 201 a includes cells that operate at a first frequency layer (i.e., the macro cell 202), cell group 201 b includes cells that operate at a second frequency layer (i.e., the macro cell 204 and the small cell 206), and cell group 201 c includes cells that operate at a third frequency layer (i.e., small cells 208 and 210).
  • the cell groups 201 a-c are vertically separated in FIG. 2 for clarity, the cell groups 201 a-c correspond to a single geographical region wherein cells operating at different frequency layers overlap with each other.
  • the term "frequency layer" can refer to a carrier frequency.
  • FIG. 2 The following hypothetical scenario uses FIG. 2 to provide an example of how limitations of the current load-balancing approach used in 3GPP LTE networks can result in a suboptimal distribution of idle-mode user equipments (UEs) across cells that use different frequency layers.
  • UEs idle-mode user equipments
  • many of the UEs 222a-n are all closely located to one another at a large event such as a football game.
  • the UEs 222a-n are used to call family members and friends to report event results, to arrange rides from the event, and to organize meeting places for after-event get-togethers.
  • Many of the UEs 222a-n attempt to establish connection sat about the same time.
  • the first frequency layer is overloaded such that it would behoove the cellular network to offload some of the UEs 222a-n to the second and third frequency layers (e.g. by putting the second frequency layer and the third frequency layer at a higher priority than the first frequency layer).
  • the cellular network prioritizes any of the frequency layers when the UEs 222a-n are in idle mode, all of the UEs 222a-n will tend to camp on the same frequency layer and hence overload the same cell. This scenario can be caused, for example, when small cells 206 and 208 are not perfectly aligned or when one of the small cells 206 and 208 uses a lower carrier frequency and therefore has a different signal quality.
  • the current broadcast frequency priority scheme of 3GPP LTE networks does not facilitate a more uniform distribution of the UEs 222a-n across multiple cells or frequency layers.
  • a network should be able to redistribute idle-mode UEs that are camped on to several different carriers amongst the carriers such that no one frequency layer has to be overloaded while other carriers are under-loaded. It should also be possible for the network to distribute UEs that are moving between cells amongst different carriers. Different deployment scenarios should be supported, such as macro-only networks and co-channel and inter-frequency small-cell deployments.
  • eMBMS evolved Multimedia Broadcast- Multicast-Service
  • UE capabilities e.g., support for certain bands
  • differences in carrier bandwidth for different carriers e.g., in terms of system throughput, connection establishment, resource allocation, and mobility-related signaling
  • Systems and technologies of the present disclosure address two different stages of load distribution. For the first stage, a UE determines that cell reselection should be performed. In the second stage, the UE identifies a cell to which it should reselect. Examples of the present disclosure that address both stages are provided.
  • a UE can determine that the network has configured a dedicated signal priority. If timer associated with the dedicated signal priority has not expired, the UE can follow the dedicated signal priority and refrain from performing cell reselection.
  • the UE can be configured to determine that a network System Information (SI) broadcast priority has changed and that the UE should therefore perform cell reselection.
  • SI System Information
  • the UE can compare previously received SI information to current SI information to see if any changes have been made.
  • the network can broadcast a one-bit indicator that indicates whether any changes have been made.
  • the network can use a number to identify versions of SI information. If current SI information and previous SI information have different numbers, the UE can conclude that changes have been made to the SI.
  • a UE can start a timer when cell reselection is performed (or attempted). The UE can refrain from performing cell reselection again until the timer expires or until the current cell's signal condition becomes too poor (e.g., when an out-of-sync signal is received or as measured by a threshold value).
  • the timer and the timer's length can be configured by the network via a broadcast message or a dedicated signal or can be specified in the specification.
  • the network can configure a probability of cell reselection (P re s)-
  • P res probability of cell reselection
  • a UE can use the P res to perform a probabilistic process by which the UE decides whether to perform cell reselection.
  • the P res can be a literal probability (e.g., a real number ranging from zero to one, inclusive) or any value that directly or indirectly indicates a probability with which the UE should decide to perform cell reselection when a probabilistic process is performed at the UE.
  • a UE can start a timer when cell reselection is performed or attempted. When the timer expires, the UE can use a P res to determine, probabilistically, whether the UE should perform cell reselection.
  • the timer and the timer's length can be configured by the network via a broadcast message or a dedicated signal or can be specified in the specification.
  • the P res can be a literal probability (e.g., a real number ranging from zero to one, inclusive) or any value that directly or indirectly indicates a probability with which the UE should decide to perform cell reselection when a probabilistic process is performed at the UE.
  • the UE can move on to stage 2.
  • the network can provide the UE with a cell-specific probability for each of a plurality of cells in the network.
  • the UE can then apply a probabilistic process that uses the cell-specific probabilities to select a cell to which the UE should reselect.
  • Each cell-specific probability can be a literal probability (e.g., a real number ranging from zero to one, inclusive) or any value that directly or indirectly indicates a probability with which the UE should reselect to the respective cell corresponding to the cell-specific probability.
  • FIG. 3 illustrates an example of a multiple-frequency deployment of a cellular network with macro cells 302 and 304 and small cell 306.
  • Macro cell 302 may be served by the evolved node B (eNB) 308, while macro cell 304 may be served by the eNB 310.
  • Small cell 306, 108 may be served by small eNBs 312.
  • the UEs 314 and 316 can be camped onto, or otherwise connected to, the macro cell 302.
  • FIG. 3 is organized vertically into two cell groups 301a-b.
  • Cell group 301 a includes cells that operate at a first frequency layer (i.e., the macro cell 302), while cell group 301 b includes cells that operate at a second frequency layer (i.e., the macro cell 304 and the small cell 306.
  • the cell groups 301 a-b are vertically separated in FIG. 3 for clarity, the cell groups 301 a-b correspond to a single geographical region wherein cells operating at different frequency layers overlap with each other.
  • the term "frequency layer" can refer to a carrier frequency.
  • FIG. 3 uses an example of how technology of the present disclosure can improve the distribution of idle-mode user equipments (UEs) across cells that use different frequency layers.
  • UEs idle-mode user equipments
  • the network wants UE 314 and UE 316 to reselect to macro cell 304 and small cell 306.
  • the network therefore indicates to the UEs 314 and 316 that macro cell 304 has a cell-specific probability of 0.4 (40%) and the small cell 306 also has a cell-specific probability of 0.4 (40%).
  • the UEs 314 and 316 then perform cell reselection using the cell-specific probability values provided by the network.
  • the UE 314 will probabilistically reselect to the small cell 306 (although the small eNB 312 is farther away than the macro eNB 310) and that UE 316 will probabilistically reselect to the macro cell 304 (although the macro eNB 310 is farther away than the small eNB 312). If this occurs, the UEs 314 and 316 may not have the best throughput that is possible under the circumstances because the Signal-to-Interference Noise Ratio (SINR) was not taken into account during the reselection process.
  • SINR Signal-to-Interference Noise Ratio
  • the network can configure a UE channel condition bias. For example, the network can set the UE channel condition bias to 0.2 (20%). Each UE can then add 0.2 (20%) to the cell- specific probability of the cell with a highest SINR as measured at the respective UE. Hence, in the scenario shown in FIG. 3, the UE 314 would add 0.2 (20%) to the cell- specific probability of macro cell 304 such that the UE 314 would reselect to the macro cell 304 with probability 0.6 (60%).
  • the UE 316 would add 0.2 (20%) to the cell-specific probability of small cell 306 such that the UE 316 would reselect to the small cell 306 with probability 0.6 (60%).
  • the odds of each UE reselecting to a cell with a higher SINR is increased.
  • FIG. 4 illustrates functionality 400 of a UE in accordance with an example.
  • the functionality 400 can be implemented as a method or the functionality can be executed as instructions on a machine (e.g., by one or more processors), where the instructions are included on at least one non-transitory computer-readable storage medium.
  • circuitry at the UE can be configured to receive a network broadcast
  • the circuitry at the UE can be further configured to determine that a cell-reselection condition is met while the UE is in the idle mode.
  • the network broadcast communication can include an indicator bit and the circuitry at the UE can be further configured to determine that the cell-reselection condition is met based on the indicator bit.
  • the circuitry at the UE can be further configured to compare the current SI to previous system information (SI) that was received at the UE before the network broadcast communication; identify, based on the comparison, one or more differences between the current SI and the previous SI; and determine that the cell-reselection condition is met based on the one or more differences.
  • SI system information
  • previous system information can be received at the UE before the network broadcast communication was received at the UE.
  • the previous SI can be associated with a first number; the current SI can be associated with a second number; and the circuitry can be further configured to compare the first number and the second number and determine that the cell-reselection condition is met based on the comparison.
  • the circuitry at the UE can be further configured to identify a timer value indicating an amount of time elapsed since a last cell-reselection operation was performed at the UE; and determine that the cell-reselection condition is met based on the timer value.
  • the circuitry at the UE can be further configured to receive a probability of cell reselection (P res ) from the cellular base station; probabilistically generate a reselection-onset value; compare the P res to the reselection-onset value; and determine that the cell-reselection condition is met based on the comparison.
  • P res probability of cell reselection
  • the circuitry at the UE can be further configured to identify a timer value indicating an amount of time elapsed since a last cell-reselection operation was performed at the UE; determine that the amount of time elapsed meets or exceeds a predefined threshold; generate the reselection-onset value after determining that the amount of time elapsed meets or exceeds the predefined threshold; and determine that the cell-reselection condition is met based on the comparison and based on the determination that the amount of time elapsed meets or exceeds the predefined threshold.
  • the circuitry at the UE can be further configured to probabilistically generate a cell-selection value.
  • the circuitry at the UE can be further configured to receive a channel condition bias from the cellular base station; measure a plurality of signal-to-noise interference ratios (SF Rs) or Reference Signal Received Powers (RSRPs) corresponding to the plurality of cells; identify a highest-SINR/RSRP cell, in the plurality of cells, that is associated with a highest SINR RSRP in the plurality of SINRs/RSRP; and add the channel condition bias to a cell-specific reselection value, in the plurality of cell-specific reselection values, that is associated with the highest-SINR/RSRP cell.
  • SF Rs signal-to-noise interference ratios
  • RSRPs Reference Signal Received Powers
  • the circuitry at the UE can be further configured to select a cell from the plurality of cells for cell reselection by the UE based on the cell-selection value and based on one or more of the plurality of cell-specific reselection values.
  • FIG. 5 illustrates functionality 500 of a cellular base station in accordance with an example.
  • the functionality 500 can be implemented as a method or the functionality can be executed as instructions on a machine (e.g., by one or more processors), where the instructions are included on at least one non-transitory computer- readable storage medium.
  • circuitry at the cellular base station can be configured to send a network broadcast communication, the network broadcast communication including current system information (SI) that comprises a plurality of cell-specific values for a plurality of respective cells, and wherein a plurality of frequency layers is used by the plurality of cells.
  • SI current system information
  • the circuitry at the cellular base station can be further configured to identify a channel condition bias for a user equipment (UE).
  • UE user equipment
  • the circuitry at the cellular base station can be further configured to send the channel condition bias to the user equipment (UE) to enable the UE to add the channel condition bias to a cell-specific value for a high-priority cell, wherein the plurality of cell-specific values comprises the cell-specific value and the plurality of respective cells comprises the high-priority cell.
  • the cell-specific value can be a probability value or a priority value.
  • the circuitry at the cellular base station can be further configured to identify a cell-reselection probability value (P res ) for the UE; and send the P res to the UE to enable the UE to use a probabilistic process to determine whether the UE should perform a cell-reselection process based on the P res .
  • the circuitry at the cellular base station can be further configured to identify a cell-reselection timer value for the UE; and send the cell-reselection timer value to the UE to enable the UE to use a timer to determine when to commence the probabilistic process.
  • FIG. 6 provides an example illustration of a mobile device, such as a user equipment (UE), a mobile station (MS), a mobile wireless device, a mobile
  • the mobile device can include one or more antennas configured to communicate with a node, macro node, low power node (LPN), or, transmission station, such as a base station (BS), an evolved Node B (eNB), a baseband processing unit (BBU), a remote radio head (R H), a remote radio equipment (RRE), a relay station (RS), a radio equipment (RE), or other type of wireless wide area network (WWAN) access point.
  • the mobile device can be configured to communicate using at least one wireless communication standard such as, but not limited to, 3GPP LTE, WiMAX, High Speed Packet Access (HSPA), Bluetooth, and WiFi.
  • the mobile device can communicate using separate antennas for each wireless communication standard or shared antennas for multiple wireless communication standards.
  • the mobile device can communicate in a wireless local area network (WLAN), a wireless personal area network (WPAN), and/or a WWAN.
  • WLAN wireless local area network
  • WPAN wireless personal area network
  • WWAN wireless wide area network
  • the mobile device can also comprise a wireless modem.
  • the wireless modem can comprise, for example, a wireless radio transceiver and baseband circuitry (e.g., a baseband processor).
  • the wireless modem can, in one example, modulate signals that the mobile device transmits via the one or more antennas and demodulate signals that the mobile device receives via the one or more antennas.
  • the mobile device can include a storage medium.
  • the storage medium can be associated with and/or communication with the application processor, the graphics processor, the display, the non-volatile memory port, and/or internal memory.
  • the application processor and graphics processor are storage mediums.
  • FIG. 6 also provides an illustration of a microphone and one or more speakers that can be used for audio input and output from the mobile device.
  • the display screen can be a liquid crystal display (LCD) screen, or other type of display screen such as an organic light emitting diode (OLED) display.
  • the display screen can be configured as a touch screen.
  • the touch screen can use capacitive, resistive, or another type of touch screen technology.
  • An application processor and a graphics processor can be coupled to internal memory to provide processing and display capabilities.
  • a non-volatile memory port can also be used to provide data input/output options to a user.
  • the non-volatile memory port can also be used to expand the memory capabilities of the mobile device.
  • a keyboard can be integrated with the mobile device or wirelessly connected to the wireless device to provide additional user input.
  • a virtual keyboard can also be provided using the touch screen.
  • FIG. 7 provides an example illustration of a user equipment (UE) device
  • the UE device 700 can include one or more antennas configured to communicate with a node or transmission station, such as a base station (BS), an evolved Node B (eNB), a baseband unit (BBU), a remote radio head (RRH), a remote radio equipment (RRE), a relay station (RS), a radio equipment (RE), a remote radio unit (RRU), a central processing module (CPM), or other type of wireless wide area network ( WWAN) access point.
  • BS base station
  • eNB evolved Node B
  • BBU baseband unit
  • RRH remote radio head
  • RRE remote radio equipment
  • RS relay station
  • RE radio equipment
  • RRU remote radio unit
  • CCM central processing module
  • the UE device 700 can be configured to communicate using at least one wireless communication standard such as, but not limited to, 3GPP LTE, WiMAX, High Speed Packet Access (HSPA), Bluetooth, and WiFi.
  • the UE device 700 can communicate using separate antennas for each wireless communication standard or shared antennas for multiple wireless communication standards.
  • the UE device 700 can communicate in a wireless local area network (WLAN), a wireless personal area network (WPAN), and/or a WWAN.
  • WLAN wireless local area network
  • WPAN wireless personal area network
  • WWAN wireless wide area network
  • the UE device 700 may include application circuitry 702, baseband circuitry 704, Radio Frequency (RF) circuitry 706, front-end module (FEM) circuitry 708 and one or more antennas 710, coupled together at least as shown.
  • application circuitry 702 baseband circuitry 704, Radio Frequency (RF) circuitry 706, front-end module (FEM) circuitry 708 and one or more antennas 710, coupled together at least as shown.
  • RF Radio Frequency
  • FEM front-end module
  • the application circuitry 702 may include one or more application processors.
  • the application circuitry 702 may include circuitry such as, but not limited to, one or more single-core or multi-core processors.
  • the processor(s) may include any combination of general-purpose processors and dedicated processors (e.g., graphics processors, application processors, etc.).
  • the processors may be coupled with and/or may include memory/storage (e.g., storage medium 712) and may be configured to execute instructions stored in the memory /storage (e.g., storage medium 712) to enable various applications and/or operating systems to run on the system.
  • the baseband circuitry 704 may include circuitry such as, but not limited to, one or more single-core or multi-core processors.
  • the baseband circuitry 704 may include one or more baseband processors and/or control logic to process baseband signals received from a receive signal path of the RF circuitry 706 and to generate baseband signals for a transmit signal path of the RF circuitry 706.
  • Baseband processing circuity 704 may interface with the application circuitry 702 for generation and processing of the baseband signals and for controlling operations of the RF circuitry 706.
  • the baseband circuitry 704 may include a second generation (2G) baseband processor 704a, third generation (3G) baseband processor 704b, fourth generation (4G) baseband processor 704c, and/or other baseband processors) 704d for other existing generations, generations in development or to be developed in the future (e.g., fifth generation (5G), 6G, etc.).
  • the baseband circuitry 704 e.g., one or more of baseband processors 704a-d
  • the radio control functions may include, but are not limited to, signal
  • modulation/demodulation circuitry of the baseband circuitry 704 may include Fast-Fourier Transform (FFT), precoding, and/or constellation
  • encoding/decoding circuitry of the baseband circuitry 704 may include convolution, tail-biting convolution, turbo, Viterbi, and/or Low Density Parity Check (LDPC) encoder/decoder functionality.
  • LDPC Low Density Parity Check
  • Embodiments of modulation/demodulation and encoder/decoder functionality are not limited to these examples and may include other suitable functionality in other embodiments.
  • the baseband circuitry 704 may include elements of a protocol stack such as, for example, elements of an evolved universal terrestrial radio access network (EUTRAN) protocol including, for example, physical (PHY), media access control (MAC), radio link control (RLC), packet data convergence protocol
  • EUTRAN evolved universal terrestrial radio access network
  • PHY physical
  • MAC media access control
  • RLC radio link control
  • a central processing unit (CPU) 704e of the baseband circuitry 704 may be configured to run elements of the protocol stack for signaling of the PHY, MAC, RLC, PDCP and/or RRC layers.
  • the baseband circuitry may include one or more audio digital signal processors) (DSP) 704f.
  • the audio DSP(s) 704f may include elements for
  • compression/decompression and echo cancellation may include other suitable processing elements in other embodiments.
  • Components of the baseband circuitry may be suitably combined in a single chip, a single chipset, or disposed on a same circuit board in some embodiments.
  • some or all of the constituent components of the baseband circuitry 704 and the application circuitry 702 may be implemented together such as, for example, on a system on a chip (SOC).
  • SOC system on a chip
  • the baseband circuitry 704 may provide for communication compatible with one or more radio technologies.
  • the baseband circuitry 704 may support communication with an evolved universal terrestrial radio access network (EUTRAN) and/or other wireless metropolitan area networks (WMAN), a wireless local area network (WLAN), a wireless personal area network (WPAN).
  • EUTRAN evolved universal terrestrial radio access network
  • WMAN wireless metropolitan area networks
  • WLAN wireless local area network
  • WPAN wireless personal area network
  • multi-mode baseband circuitry Embodiments in which the baseband circuitry 704 is configured to support radio communications of more than one wireless protocol.
  • the RF circuitry 706 may enable communication with wireless networks using modulated electromagnetic radiation through a non-solid medium.
  • the RF circuitry 706 may include switches, filters, amplifiers, etc. to facilitate the communication with the wireless network.
  • RF circuitry 706 may include a receive signal path which may include circuitry to down-convert RF signals received from the FEM circuitry 708 and provide baseband signals to the baseband circuitry 704.
  • RF circuitry 706 may also include a transmit signal path which may include circuitry to up-convert baseband signals provided by the baseband circuitry 704 and provide RF output signals to the FEM circuitry 708 for transmission.
  • the RF circuitry 706 may include a receive signal path and a transmit signal path.
  • the receive signal path of the RF circuitry 706 may include mixer circuitry 706a, amplifier circuitry 706b and filter circuitry 706c.
  • the transmit signal path of the RF circuitry 706 may include filter circuitry 706c and mixer circuitry 706a.
  • RF circuitry 706 may also include synthesizer circuitry 706d for synthesizing a frequency for use by the mixer circuitry 706a of the receive signal path and the transmit signal path.
  • the mixer circuitry 706a of the receive signal path may be configured to down-convert RF signals received from the FEM circuitry 708 based on the synthesized frequency provided by synthesizer circuitry 706d.
  • the amplifier circuitry 706b may be configured to amplify the down-converted signals and the filter circuitry 706c may be a low-pass filter (LPF) or band-pass filter (BPF) configured to remove unwanted signals from the down-converted signals to generate output baseband signals.
  • Output baseband signals may be provided to the baseband circuitry 704 for further processing.
  • the output baseband signals may be zero-frequency baseband signals, although other types of baseband signals can be used.
  • mixer circuitry 706a of the receive signal path may comprise passive mixers, although the scope of the embodiments is not limited in this respect.
  • the mixer circuitry 706a of the transmit signal path may be configured to up-convert input baseband signals based on the synthesized frequency provided by the synthesizer circuitry 706d to generate RF output signals for the FEM circuitry 708.
  • the baseband signals may be provided by the baseband circuitry 704 and may be filtered by filter circuitry 706c.
  • the filter circuitry 706c may include a low- pass filter (LPF), although the scope of the embodiments is not limited in this respect.
  • LPF low- pass filter
  • the mixer circuitry 706a of the receive signal path and the mixer circuitry 706a of the transmit signal path may include two or more mixers and may be arranged for quadrature down-conversion and/or up-conversion respectively.
  • the mixer circuitry 706a of the receive signal path and the mixer circuitry 706a of the transmit signal path may include two or more mixers and may be arranged for image rejection (e.g., Hartley image rejection).
  • the mixer circuitry 706a of the receive signal path and the mixer circuitry 706a may be arranged for direct down-conversion and/or direct up-conversion, respectively.
  • the mixer circuitry 706a of the receive signal path and the mixer circuitry 706a of the transmit signal path may be configured for super-heterodyne operation.
  • the output baseband signals and the input baseband signals may be analog baseband signals, although the scope of the embodiments is not limited in this respect.
  • the output baseband signals and the input baseband signals may be digital baseband signals.
  • the RF circuitry 706 may include analog-to-digital converter (ADC) and digital-to-analog converter (DAC) circuitry and the baseband circuitry 704 may include a digital baseband interface to communicate with the RF circuitry 706.
  • ADC analog-to-digital converter
  • DAC digital-to-analog converter
  • the baseband circuitry 704 may include a digital baseband interface to communicate with the RF circuitry 706.
  • a separate radio IC circuitry may be provided for processing signals for each spectrum, although the scope of the
  • the synthesizer circuitry 706d may be a fractional- N synthesizer or a fractional N N+l synthesizer, although the scope of the embodiments is not limited in this respect as other types of frequency synthesizers may be suitable.
  • synthesizer circuitry 706d may be a delta-sigma synthesizer, a frequency multiplier, or a synthesizer comprising a phase-locked loop with a frequency divider.
  • the synthesizer circuitry 706d may be configured to synthesize an output frequency for use by the mixer circuitry 706a of the RF circuitry 706 based on a frequency input and a divider control input.
  • the synthesizer circuitry 706d may be a fractional N/N+l synthesizer.
  • frequency input may be provided by a voltage controlled oscillator (VCO), although other types of devices may provide the frequency input.
  • VCO voltage controlled oscillator
  • Divider control input may be provided by either the baseband circuitry 704 or the applications processor 702 depending on the desired output frequency.
  • a divider control input (e.g., N) may be determined from a look-up table based on a channel indicated by the applications processor 702.
  • Synthesizer circuitry 706d of the RF circuitry 706 may include a divider, a delay-locked loop (DLL), a multiplexer and a phase accumulator.
  • the divider may be a dual modulus divider (DMD) and the phase accumulator may be a digital phase accumulator (DPA).
  • the DMD may be configured to divide the input signal by either N or N+l (e.g., based on a carry out) to provide a fractional division ratio.
  • the DLL may include a set of cascaded, tunable, delay elements, a phase detector, a charge pump and a D-type flip-flop.
  • the delay elements may be configured to break a VCO period up into Nd equal packets of phase, where Nd is the number of delay elements in the delay line.
  • Nd is the number of delay elements in the delay line.
  • synthesizer circuitry 706d may be configured to generate a carrier frequency as the output frequency, while in other embodiments, the output frequency may be a multiple of the carrier frequency (e.g., twice the carrier frequency, four times the carrier frequency) and used in conjunction with quadrature generator and divider circuitry to generate multiple signals at the carrier frequency with multiple different phases with respect to each other.
  • the output frequency may be a LO frequency (fLO).
  • the RF circuitry 706 may include an IQ/polar converter.
  • FEM circuitry 708 may include a receive signal path which may include circuitry configured to operate on RF signals received from one or more antennas 710, amplify the received signals and provide the amplified versions of the received signals to the RF circuitry 706 for further processing.
  • FEM circuitry 708 may also include a transmit signal path which may include circuitry configured to amplify signals for transmission provided by the RF circuitry 706 for transmission by one or more of the one or more antennas 710.
  • the FEM circuitry 708 may include a TX/RX switch to switch between transmit mode and receive mode operation.
  • the FEM circuitry may include a receive signal path and a transmit signal path.
  • the receive signal path of the FEM circuitry may include a low-noise amplifier (LNA) to amplify received RF signals and provide the amplified received RF signals as an output (e.g., to the RF circuitry 706).
  • LNA low-noise amplifier
  • the transmit signal path of the FEM circuitry 708 may include a power amplifier (PA) to amplify input RF signals (e.g., provided by RF circuitry 706), and one or more filters to generate RF signals for subsequent transmission (e.g., by one or more of the one or more antennas 710.
  • PA power amplifier
  • the UE device 700 may include additional elements such as, for example, memory /storage, display (e.g., touch screen), camera, antennas, keyboard, microphone, speakers, sensor, and/or input/output (I/O) interface.
  • display e.g., touch screen
  • I/O input/output
  • FIG. 8 illustrates a diagram 800 of a node 810 (e.g., eNB and/or a Serving GPRS Support Node) and a wireless device 820 (e.g., UE) in accordance with an example.
  • the node can include a base station (BS), a Node B (NB), an evolved Node B (eNB), a baseband unit (BBU), a remote radio head (RRH), a remote radio equipment (RRE), a remote radio unit (RRU), or a central processing module (CPM).
  • the node can be a Serving GPRS Support Node.
  • the node 810 can include a node device 812.
  • the node device 812 or the node 810 can be configured to communicate with the wireless device 820.
  • the node device 812 can be configured to implement technologies described herein.
  • the node device 812 can include a processing module 814 and a transceiver module 816.
  • the node device 812 can include the transceiver module 816 and the processing module 814 forming a circuitry for the node 810.
  • the transceiver module 816 and the processing module 814 can form a circuitry of the node device 812.
  • the processing module 814 can include one or more processors and memory.
  • the processing module 822 can include one or more application processors.
  • the transceiver module 816 can include a transceiver and one or more processors and memory.
  • the transceiver module 816 can include a baseband processor.
  • the wireless device 820 can include a transceiver module 824 and a processing module 822.
  • the processing module 822 can include one or more processors and memory. In one embodiment, the processing module 822 can include one or more application processors.
  • the transceiver module 824 can include a transceiver and one or more processors and memory. In one embodiment, the transceiver module 824 can include a baseband processor.
  • the wireless device 820 can be configured to implement technologies described herein.
  • the node 810 and the wireless devices 820 can also include one or more storage mediums, such as the transceiver module 816, 824 and/or the processing module 814, 822.
  • Example 1 a user equipment (UE) configured to support cell reselection while the UE is in an idle mode, the UE comprising one or more processors and memory configured to: identify a network broadcast communication received from a eNB, the network broadcast communication including current system information (SI) that comprises a plurality of cell-specific reselection values for a plurality of respective cells, and wherein a plurality of frequency layers is used by the plurality of cells; determine that a cell-reselection condition is met while the UE is in the idle mode; probabilistically generate a cell-selection value; and select a cell from the plurality of cells for cell reselection by the UE based on the cell-selection value and based on one or more of the plurality of cell-specific reselection values.
  • SI current system information
  • Example 2 includes the UE of example 1 , wherein the one or more processors and memory are further configured to: compare the current SI to previous system information (SI) that was received at the UE before the network broadcast communication was received at the UE; identify, based on the comparison, one or more differences between the current SI and the previous SI; and determine that the cell- reselection condition is met based on the one or more differences.
  • SI system information
  • Example 3 includes the UE of example 1 or 2, wherein the network broadcast communication includes an indicator bit and the one or more processors and memory are further configured to determine that the cell-reselection condition is met based on the indicator bit.
  • Example 4 includes the UE of example 1 , wherein: previous system information (SI) that was received at the UE before the network broadcast communication was received at the UE is associated with a first number; the current SI is associated with a second number; and the one or more processors and memory are further configured to compare the first number and the second number and determine that the cell-reselection condition is met based on the comparison.
  • SI system information
  • Example 5 includes the UE of example 1, 2, or 4, wherein the one or more processors and memory are further configured to: identify a timer value indicating an amount of time elapsed since a last cell-reselection operation was performed at the UE; and determine that the cell-reselection condition is met based on the timer value.
  • Example 6 includes the UE of example 1, 2, or 4, wherein the one or more processors and memory are further configured to: identify a probability of cell reselection (P res ) received from the cellular base station; probabilistically generate a reselection-onset value; compare the P res to the reselection-onset value; and determine that the cell- reselection condition is met based on the comparison.
  • P res probability of cell reselection
  • Example 7 includes the UE of example 6, wherein the one or more processors and memory are further configured to: identify a timer value indicating an amount of time elapsed since a last cell-reselection operation was performed at the UE; determine that the amount of time elapsed meets or exceeds a predefined threshold; generate the reselection-onset value after determining that the amount of time elapsed meets or exceeds the predefined threshold; and determine that the cell-reselection condition is met based on the comparison and based on the determination that the amount of time elapsed meets or exceeds the predefined threshold.
  • Example 8 includes the UE of example 1 , 2, or 4, wherein the one or more processors and memory are further configured to: identify a channel condition bias received from the cellular base station; measure a plurality of signal-to-noise interference ratios (SI Rs) or Reference Signal Received Powers (RSRPs) corresponding to the plurality of cells; identify a highest- SINR/RSRP cell, in the plurality of cells, that is associated with a highest SINR/RSRP in the plurality of SINRs RSRP; and add the channel condition bias to a cell-specific reselection value, in the plurality of cell-specific reselection values, that is associated with the highest-SINR/RSRP cell.
  • SI Rs signal-to-noise interference ratios
  • RSRPs Reference Signal Received Powers
  • Example 9 includes a cellular base station comprising one or more processors and memory configured to: signal transceiver circuitry at the cellular base station to send a network broadcast communication, the network broadcast
  • SI current system information
  • UE user equipment
  • UE user equipment
  • Example 10 includes the cellular base station of example 9, wherein the cell-specific value is a probability value.
  • Example 1 1 includes the cellular base station of example 9, wherein the cell-specific value is a priority value.
  • Example 12 includes the cellular base station of example 9, 10, or 1 1, wherein the circuitry is further configured to: identify a cell-reselection probability value (P res ) for the UE; and send the P res to the UE to enable the UE to use a probabilistic process to determine whether the UE should perform a cell-reselection process based on the P re s.
  • P res cell-reselection probability value
  • Example 13 includes the cellular base station of example 12, wherein the one or more processors and memory are further configured to: identify a cell-reselection timer value for the UE; and signal the transceiver circuitry at the cellular base station to send the cell-reselection timer value to the UE to enable the UE to use a timer to determine when to commence the probabilistic process.
  • Example 14 includes a non-transitory or transitory computer-readable medium having instructions thereon which, when executed by one or more processors of a user equipment (UE), perform the following: identifying a network broadcast communication sent from a cellular base station to the UE, the network broadcast communication including current system information (SI) that comprises a plurality of cell-specific values for a plurality of respective cells, and wherein a plurality of frequency layers is used by the plurality of cells; determining that a cell-reselection condition is met while the UE is in a power-saving mode; identifying a randomly selected cell-selection value; and selecting a cell from the plurality of cells for the UE based on the randomly selected cell-selection value and based on the plurality of cell-specific values.
  • SI system information
  • Example 15 includes the computer-readable medium of example 14, further comprising instructions thereon which, when executed by one or more processors of the UE, perform the following: comparing the current SI to previous system information (SI) that was received at the UE before the network broadcast communication was received at the UE; identifying, based on the comparison, one or more differences between the current SI and the previous SI; and determining that the cell-reselection condition is met based on the one or more differences.
  • SI system information
  • Example 16 includes the computer-readable medium of example 14, further comprising instructions thereon which, when executed by one or more processors of the UE, perform the following: determining that the cell-reselection condition is met based on an indicator bit that is included in the network broadcast communication.
  • Example 17 includes the computer-readable medium of example 14, 15, or 16, further comprising instructions thereon which, when executed by one or more processors of the UE, perform the following: identifying previous system information (SI) sent from the cellular base station to the UE before the network broadcast communication was received, the previous SI comprising a first Si-indicator number, wherein the current SI comprises a second Si-indicator number; comparing the first Si-indicator number and the second Si-indicator number; and determining that the cell-reselection condition is met based on the comparison.
  • SI system information
  • Example 18 includes the computer-readable medium of example 14, 15, or 16, further comprising instructions thereon which, when executed by one or more processors, perform the following: identifying a timer value indicating an amount of time elapsed since a last cell-reselection operation was performed at the UE; and determining that the cell-reselection condition is met based on the timer value.
  • Example 19 includes the computer-readable medium of example 14, 15, or 16, further comprising instructions thereon which, when executed by one or more processors, perform the following: identifying a probability of cell reselection (P res ) sent from the cellular base station to the UE; identifying a randomly selected reselection-onset value; comparing the P res to the reselection-onset value; and determining that the cell- reselection condition is met based on the comparison.
  • P res probability of cell reselection
  • Example 20 includes the computer-readable medium of example 19, further comprising instructions thereon which, when executed by one or more processors, perform the following: identifying a timer value indicating an amount of time elapsed since a last cell-reselection operation was performed at the UE; determining that the amount of time elapsed meets or exceeds a predefined threshold; identifying a randomly selected random reselection-onset value after determining that the amount of time elapsed meets or exceeds the predefined threshold; and determining that the cell-reselection condition is met based on the comparison and based on the determination that the amount of time elapsed meets or exceeds the predefined threshold.
  • Example 21 includes the computer-readable medium of example 14, 15, or 16, further comprising instructions thereon which, when executed by one or more processors, perform the following: identifying a channel condition bias received from the cellular base station; measuring a plurality of signal-to-noise interference ratios (SINRs) or Reference Signal Received Powers (RSRPs) corresponding to the plurality of cells; identifying a highest-Si R/RSRP cell in the plurality of cells, wherein the highest- SI R/RSRP cell is associated with a highest SI R RSRP in the plurality of
  • SINRs signal-to-noise interference ratios
  • RSRPs Reference Signal Received Powers
  • SINRs RSRPs SINRs RSRPs
  • adding the channel condition bias to a cell-specific probability value in the plurality of cell-specific probability values, wherein the cell-specific probability value is associated with the highest- SINR/RSRP cell.
  • Example 22 includes a cellular base station comprising one or more processors and memory configured to: signal transceiver circuitry at the cellular base station to send a network broadcast communication, the network broadcast
  • SI current system information
  • UE user equipment
  • UE user equipment
  • UE user equipment
  • UE user equipment
  • the transceiver circuitry at the cellular base station to send the channel condition bias to the user equipment (UE) to enable the UE to add the channel condition bias to a cell-specific value for a high-priority cell, wherein the cell-specific value is a probability value or a priority value, and wherein the plurality of cell-specific values comprises the cell-specific value and the plurality of respective cells comprises the high-priority cell.
  • Example 23 includes the cellular base station of example 22, wherein the circuitry is further configured to: identify a cell-reseiection probability value (P res ) for the UE; and signal the transceiver circuitry at the cellular base station to send the P res to the UE to enable the UE to use a probabilistic process to determine whether the UE should perform a cell-reseiection process based on the P res -
  • Example 24 includes the cellular base station of example 23, wherein the circuitry is further configured to: identify a cell-reseiection timer value for the UE; and signal the transceiver circuitry at the cellular base station to send the cell-reseiection timer value to the UE to enable the UE to use a timer to determine when to commence the probabilistic process.
  • P res cell-reseiection probability value
  • Example 25 includes a means for supporting cell reselection for a UE in an idle mode, the means comprising: a means for receiving a network broadcast
  • the network broadcast communication including current system information (SI) that comprises a plurality of cell-specific values for a plurality of respective cells, and wherein a plurality of frequency layers is used by the plurality of cells; a means for determining that a cell-reseiection condition is met while the UE is in a power-saving mode; a means for identifying a randomly selected cell-selection value; and a means for selecting a cell from the plurality of cells for the UE based on the randomly selected cell-selection value and based on the plurality of cell-specific values.
  • SI system information
  • Example 26 includes the means of example 25, further comprising: a means for comparing the current SI to previous system information (SI) that was received at the UE before the network broadcast communication was received at the UE; a means for identifying, based on the comparison, one or more differences between the current SI and the previous SI; and a means for determining that the cell-reseiection condition is met based on the one or more differences.
  • SI system information
  • Example 27 includes the means of example 25, further comprising: a means for determining that the cell-reseiection condition is met based on an indicator bit that is included in the network broadcast communication.
  • Example 28 includes the means of example 25, further comprising: a means for receiving previous system information (SI) sent from the cellular base station to the UE before receiving the network broadcast communication, the previous SI comprising a first Si-indicator number, wherein the current SI comprises a second SI- indicator number; a means for comparing the first Si-indicator number and the second SI- indicator number; and a means for determining that the cell-reselection condition is met based on the comparison.
  • SI system information
  • Example 29 includes the means of example 25, further comprising: a means for identifying a timer value indicating an amount of time elapsed since a last cell- reselection operation was performed at the UE; and a means for determining that the cell- reselection condition is met based on the timer value.
  • Example 30 includes the means of example 25, further comprising: a means for receiving a probability of cell reselection (P res ) sent from the cellular base station to the UE; a means for identifying a randomly selected reselection-onset value; a means for comparing the P res to the reselection-onset value; and a means for determining that the cell-reselection condition is met based on the comparison.
  • P res probability of cell reselection
  • Example 31 includes the means of example 30, further comprising: a means for identifying a timer value indicating an amount of time elapsed since a last cell- reselection operation was performed at the UE; a means for determining that the amount of time elapsed meets or exceeds a predefined threshold; a means for identifying a randomly selected random reselection-onset value after determining that the amount of time elapsed meets or exceeds the predefined threshold; and a means for determining that the cell-reselection condition is met based on the comparison and based on the determination that the amount of time elapsed meets or exceeds the predefined threshold.
  • Example 32 includes the means of example 25, further comprising: a means for receiving a channel condition bias from the cellular base station; a means for measuring a plurality of signal-to-noise interference ratios (SINRs) or Reference Signal Received Powers(RSRPs) corresponding to the plurality of cells; a means for identifying a highest-SINR/RSRP cell in the plurality of cells, wherein the highest-SINR/RSRP cell is associated with a highest SINR/RSRP in the plurality of SINRs RSRPs; and a means for adding the channel condition bias to a cell-specific probability value in the plurality of cell-specific probability values, wherein the cell-specific probability value is associated with the highest-SINR/RSRP cell.
  • SINRs signal-to-noise interference ratios
  • RSRPs Reference Signal Received Powers
  • Various techniques, or certain aspects or portions thereof, may take the form of program code (i.e., instructions) embodied in tangible media, such as floppy diskettes, compact disc-read-only memory (CD-ROMs), hard drives, non-transitory computer readable storage medium, or any other machine-readable storage medium wherein, when the program code is loaded into and executed by a machine, such as a computer, the machine becomes an apparatus for practicing the various techniques.
  • a non-transitory computer readable storage medium can be a computer readable storage medium that does not include signal.
  • the computing device may include a processor, a storage medium readable by the processor (including volatile and non-volatile memory and/or storage elements), at least one input device, and at least one output device.
  • the volatile and non-volatile memory and/or storage elements may be a random-access memory (RAM), erasable programmable read only memory (EPROM), flash drive, optical drive, magnetic hard drive, solid state drive, or other medium for storing electronic data.
  • the node and wireless device may also include a transceiver module (i.e., transceiver), a counter module (i.e., counter), a processing module (i.e., processor), and/or a clock module (i.e., clock) or timer module (i.e., timer).
  • a transceiver module i.e., transceiver
  • a counter module i.e., counter
  • a processing module i.e., processor
  • a clock module i.e., clock
  • timer module i.e., timer
  • One or more programs that may implement or utilize the various techniques described herein may use an application programming interface (API), reusable controls, and the like. Such programs may be implemented in a high level procedural or object oriented programming language to communicate with a computer system. However, the program(s) may be implemented in assembly or machine language, if desired. In any case, the language may be a compiled or interpreted language, and combined with hardware implementations
  • circuitry may refer to, be part of, or include an Application Specific Integrated Circuit (ASIC), an electronic circuit, a processor
  • circuitry may be implemented in, or functions associated with the circuitry may be implemented by, one or more software or firmware modules.
  • circuitry may include logic, at least partially operable in hardware.
  • the word “or” indicates an inclusive disjunction.
  • the phrase “A or B” represents an inclusive disjunction of exemplary conditions A and B. Hence, “A or B” is false only if both condition A is false and condition B is false. When condition A is true and condition B is also true, “A or B” is also true. When condition A is true and condition B is false, “A or B” is true. When condition B is true and condition A is false, “A or B” is true. In other words, the term “or,” as used herein, should not be construed as an exclusive disjunction. The term “xor” is used where an exclusive disjunction is intended.
  • processor can include general-purpose processors, specialized processors such as VLSI, FPGAs, and other types of specialized processors, as well as base-band processors used in transceivers to send, receive, and process wireless communications.
  • modules can be implemented as a hardware circuit (e.g., an application-specific integrated circuit (ASIC)) comprising custom VLSI circuits or gate arrays, off-the-shelf semiconductors such as logic chips, transistors, or other discrete components.
  • a module can also be implemented in programmable hardware devices such as field programmable gate arrays, programmable array logic, programmable logic devices or the like.
  • Modules can also be implemented in software for execution by various types of processors.
  • An identified module of executable code can, for instance, comprise one or more physical or logical blocks of computer instructions, which can, for instance, be organized as an object, procedure, or function. Nevertheless, the executables of an identified module do not have to be physically located together, but can comprise disparate instructions stored in different locations which, when joined logically together, comprise the module and achieve the stated purpose for the module.
  • a module of executable code can be a single instruction, or many instructions, and can even be distributed over several different code segments, among different programs, and across several memory devices.
  • operational data can be identified and illustrated herein within modules, and can be embodied in any suitable form and organized within any suitable type of data structure.
  • the operational data can be collected as a single data set, or can be distributed over different locations including over different storage devices, and can exist, at least partially, merely as electronic signals on a system or network.
  • the modules can be passive or active, including agents operable to perform desired functions.
  • processor can include general purpose processors, specialized processors such as VLSI, FPGAs, and other types of specialized processors, as well as base band processors used in transceivers to send, receive, and process wireless communications.

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Abstract

L'invention concerne des systèmes, des procédés, et des supports lisibles par ordinateur pour équilibrer une charge d'UE en mode veille entre des cellules en chevauchement, avec une pluralité de fréquences porteuses. L'invention vise à aider un UE à déterminer à quel moment une resélection de cellule doit être exécutée. En outre, l'invention concerne un procédé permettant à l'UE d'identifier une cellule qu'il doit resélectionner, d'après certains critères. Des procédés selon la présente invention permettent à un réseau de redistribuer des UE en mode veille, en attente sur plusieurs cellules/porteuses différentes parmi les cellules/porteuses, de telle sorte qu'aucune porteuse ne soit en surcharge lorsque d'autres sont en sous-charge.
PCT/US2015/000423 2015-05-08 2015-12-24 Répartition de charge entre une pluralité de couches de fréquence d'une pluralité de cellules WO2016182531A1 (fr)

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